To talk to your fellow competitors during a race you can use TeamSpeak free software.
Connect to the server: teamspeak.gliderracing.com, or ts3.gliderracing.com; password: ask13.

Condor Sceneries used in MNS:(some files are compressed with 7-zip, and can also be downloaded using BitTorrent file-sharing.
(Click on next to a scenery to get a torrent file).
Download speed using BitTorrent is greater than a direct download, because it downloads parts of a file also from other people besides downloading them from the server.)